PARADISE VALLEY, AZ - A year after her 6-year-old son's death, a Valley mother is questioning how he died.
It's another twist involving the mysterious mansion deaths at a Valley CEO's California home.
Dina Shacknai held a news conference from her Paradise Valley home and revealed she launched a private investigation after her son Max died.
"Even though Max is not with us today, here it is still my job as a mother to find out what happened," said Shacknai.
Investigators called Max's death an accident and said he died after falling over a stair railing inside his father's California mansion, owned by Scottsdale CEO Jonah Shacknai.
Shacknai and attorney Angela Hallier would not provide details about what the private investigation found.
"We are certain that the accident scenario put forth by the Coronado Police Department in inaccurate," said Hallier.
This is now the second family to challenge the outcome of the investigation by law enforcement.
Rebecca Zahau's family also thinks investigators got it wrong when they ruled her death a suicide.
Zahau was found naked, with her hands behind her back hanging from a second floor balcony shortly after Max's accident.
Investigators theorized Zahau killed herself because she felt guilty because she was supposed to be watching the boy when he fell.
Dina Shacknai also announced Monday that she created a nonprofit foundation in her son's name.
Maxie's HOUSE was launched to be a resource center for parents and children living in blended households.
One of the organization's goal is to educate people on the needs of children to feel safe in the homes in which they live.